@book { FlexibilisierungvonArbeitsbedingungen,
    title = "Flexibilisierung von Arbeitsbedingungen",
    author = "Cessy {Kühl}",
    year = "2021",
    publisher = "Peter Lang Verlag",
    address = "Berlin, Germany",
    url = "https://www.peterlang.com/document/1103850"
}